Metal-working machine.



P. E. BOCORSELSKI. METAL WORKING MACHINE.

APPLICATION FILED MAR. 23, 1908. 904,926. Patented Nov. 24, 1908.

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W I TNESSES Patented Nov. 24, 1908.

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UNITED STATES PATENT OFFICE.

FRANK E. BOCORSELSKI, OF SPRINGFIELD,MASSACHUSETTS.

lilmTAL-WORKING MACHINE.

Specification of Letters Patent.

Patented Nov. 24, 190s.

Appiicaaon mea march 23, 190s. serial No. 422,773.

To all whom it may concern:

Be it known that I, FRANK E. BoCoRsnLsKi,y

Ithe following is a full, clear, and exact description.

This invention applicable for incorpora tion in metal working machines comprises the combination with a member having a slideway and provided with a nut segment within, and narrower than the said slideway, of a segment member movably engaged within said slideway constructed with a marginal opening and straddling about said nut segment, a screw shaft having by one end portion thereof such character of engagement with the second named member whereby it is both rotative and capable of swinging relatively thereto, but relatively endwise immovable, a block having a non threaded semicircular recess accommodated in the longitudinal opening inthe said second member and having spring means associated therewith, and with said nut segment for yieldingly and normally forcing the shaft to screw engagement with the nut segment.

By the provision of means such as just above set forth, one of the members which may be a tool carrying arm, may be moved. for considerable distances for bringing it approximately to its working adjustment without the necessity of effecting such considerable movement in a slow way through the rotation of the screwshaft; and then when the required positioning is approximated the minute adjustment of the member may be accomplished through the coaction of the screw shaft with the nut segment.

The device or mechanism contemplated by the foregoing, in a preferable embodiment thereof, includes the provision of the semicircular-ly and non-threaded recessed block as a conjunctive part of the nut spring engaged or supported in proximity thereto, the segment and block with the spring or springs and means for guiding the block relatively to the segment constituting what may bc termed an elastic nut.

The invention furthermore comprises the combination of a supporting head or frame on which one of the aforementioned members is rotatively adjustable While the other or tool carrying member which is slidably engaged with the rotatively adjustable member has its movements in any desiredvline at ri ht angles to the axis about which the ot er member is rotatively adjusted.

This invention, furthermore, comprises in 'combination with a tool carryin arm, such for instance as that for one of t e spindles of a multiple spindle drilling machine having a bore therethrough at right an les to its length, which bore has screw t reads therein, of a sleeve externally screwithreaded, longer than the dimension of the arm in the line of its bore, engaged and axially adjustable in and through the bore of said V ai-m, a tool carrying spindle fitted for rotation through said sleeve, havin shoulders engaging at the opposite ends o the sleeve, preventing endwise movement of the s indle relatively to the sleeve, and 'means or effecting a temporary binding of the interengaged threads in said bored arm and the sleeve therein, for preventingv rotative and consequently an axial movement of the sleeve ,-such provision being of especial value for the adjustment of any one of a series of drill spindles so that all of the drills of theseries may haveetheir working ends in a common plane, irrespective of the fact that from breakage or otherwise some of the drills may be shorter than others.

The invention furthermore consists in certain particular combinations and arrangements of parts and theconstructions of some of the parts, as hereinafter described and defined in the claims.

Reference is to be had to the accompanying drawings in which the present improved devices are illustrated in their ap licability to, and embodiment in, a multip e spindle drilling machine, it being here stated, howi ever, that this is only one exemplification of the utilization of the new and im roved devices which are not necessarily limited to the type of machine especially shown.

In the drawings,-Figure 1 is a side elevation ofa multiple spindle drilling machine on the vertically movable head of which the present improved devices are located; Fig. 2 is a plan view of one of the tool carrying members which is capable of adjustment about a fixed vertical axis and which is also capable of an adjustment in any line radial to such axis and along a plane at right angles thereto, and in which, furthermore, thetool carrying spindle is capable of an adjustment, by improved means, along the line at right angles to the length of the rotatively and slidably adjustable member. Fig. 3 is a sectional view through a portion of the head or supporting frame of the machine and through the adjustable tool carrying arm. Fig. L is a vertical cross sectional view on line 4 4, Fig. 3. Fig. 5 is a verticalcross sectional view on line 5*-5, Fig. 2. Fig-6 is a face view and projected horizontal cross section showing the detailed construction of a part to be hereinafter referred to. Fig. 7 is a view of the outer end of the tool carrying arm. Fig. 8 is an under side view of an element comprised in the arrangement shown in Fig. 3 to be hereinafter particularly referred to. Fig. 9 is a perspective view showing the combination of rotatively adjustable member and elastic nut carried thereby, such rotative member being repree sented as of a somewhat modified design from that shown in Fig. 3.

I will now proceed to describe the present improvements as applied on the vertically movable head of a multiple spindle drill, it being stated, however, that the same are in whole or in part adapted for advantageous use in other situations.

In the drawings, irl-Fig. 1, A l'represents the vertically movable head of a multiple spindle drill having supporting and vertically feeding means, not necessary to here describe, nor is it considered necessary .to particularly describe the means for driving several drill spindles aja through the flexible or universal jointed shafts a2 by inclosed gearing in the upper part of the head, to Which gearing rotary movement is transmitted by the shaft B driven from a suitable source of power, as, for instance, the electric motor C.

The head is constructed at its lower portion with a circular flange like art b sustained on the under side of which are the tool carrying arms E which are variously adjustable so that the drills orvother tools carried thereby may be positioned in any desired `arrangement one to another, and either close to, or remote from, the axis of the head A.

The tool carrying arm E is not directly supported by'for sustained from the head A, but it has a supporting and slidable engagement with the head D that is sustained by and at the under side of the flange b of the he ad and is rotative relatively thereto. This head D has a slideway o therethrou h of dovetail for-m from end to end thereo and downwardly opening, adapted to which is a corresponding dovetail formation of the tool carryin Amember E, which is slidably engaged tirough such member D, and said member D has 'an upstanding affixed stud or trunnion e engaged upwardly through and beyond a circular opening 10 therefor in eoaaae the head portion b and has a nut 12 engaged with the upper screw threaded extremity thereof for sustaining the member D on the underside of. the portion b and for locking it in its rotative adjustment.

A key or pin 13 in a peculiarly constructed washer 14 is interposed between the nut in the upper side of the supporting part Z) for an advantage to be hereinafter referred to. l.

The member D is provided with a nut segment, or half nut f within said slideway c, such nut segment being affixed as a rigid part of thevmember and narrower than the dovetail way therethrough.

The tool carrying member E is con structed with a longitudinal opening 15, here shown as in the form of a groove, and it straddles by said nut segment in the manner shown in Fig. 4.

G represents a screw shaft having by an end portion thereof such a character of engagement with the tool carrying member E whereby it is both rotative and capable of a swinging movement relatively to said member E, but incapable of any endwise movement. This screw shaft as specifically shown has its end made in theform of a ball J1., and engaged or sunk for half its bulk in a semi-cylindrical cavity 17 formed in the end Wall of longitudinal groove or opening 15; and the ball ended screw shaft is confined, and the ball-and-sockety engagement perfected by the provision of a plate or block having at its inner side a partially cylindrical cavity 18 and a recess 19 leading through to the lower edge of the block, this block being secured with itscavity in opposed relation to the cavity 17 and with its portionsat either side of said recess in a straddling relation tothe portion of the screw shaft adjacent its ball end. The conv finement of the said block or plate in its place is made by the screws 20 passing from the upper edge of the block downwardly through and Within the thickness of the same and into the base of the groove 15 in the member E.

The outer or further end of the screw shaft projects beyond 'the end of the member E and is straddled by a recessed plate or block j similar inform and in mode of connection to the one z'; and the protruding end of the screw shaft is of squared or other suitable form whereby it becomes convenient to secure the rotation thereof.

lc represents a block accommodated in the longitudinal opening in the tool carrying member E, the same having a semi-cylindricalrecess 22 therein, which is plain or non-threaded and is normally positioned against the screw shaft and opposed to the nut segment f; and means are provided for ieldingly forcing such semi-circular recessed lock towards the nut segment for. nor- Inally maintaining the screw. shaft in its properly swung position wherebyit is in screw-engagement with the threads of such se ent. Asa means for spring pressing .the block c towards the nutsegment and for guiding Ait -With straight line movements, structural features and provisions will be observedas represented in Fig. /4wherein it is seen that the block la has parallel boresv23, 23, therethrough, each madeof two diameters whereby seat shoulders 24 arel formed, and headed screws 25 are by their Shanks disposed within and extended through said bores 'of the block /c and have screw enga ements into the nut segment whereby they ecome, to all intents and purposes, depending rigid members of the latter; and spiral springs 25 are interposed, under compression, between the aforementioned seat-shoulders 24 and the heads of the screws. The member D having been. positione properly in its rotative adjustment and heldl rigidly to the supporting portion b ofthe frame, the further positioning and adjustmen-tof the tool carried by the member E will be accomplished, when a considerable predetermined until the drill spindle or tool is approximately in its proper position for work, and then by permitting the `screw shaft to be spring pressed bythe blocl{c,-vvhich as will be seen is in substance a member of an elastic nut,-the minute` or fine adjust# ment may be perfected by slightly turning the shaft. Inasmuch as the combinedmembers D and E and the parts carried thereby in large-drilling machines are quite heavy, and it is desirable atthe time of removing the nutA 12 preparatory to dismantling the parts, as is sometimes desirable for various reasons, that the said slide member and tool carrying arm may not drop down from the support b, I have provided the tapered key or pin 13 for crosswise engagement through the aperture 11 in the upstanding stud e, the ends of such keyl or pin projecting beyond the opposite sides of thev stud, and the protruding ends of this key are inclosed within a transverse recess 9 in a washer m which surrounds the stud below the base of the nut, said recess having a wall 8 at its one end adjacent the larger end of the. key, preventing, in 'case of loosening of the key, the endwise displacement. thereof from its engagement shown.

The tool carrying arm E is constructed at its inner or tool carrying end with a transversely elongated boss or kneel o having a bore 28 therethrough at right angles to the length ofthe` arm, the said bore being screw threaded in the lower or boss extended portion thereof,- said boss extension havingai; split 29- along a line arallel with its axis whereby it is diametrlcally expansibleand' contractible and provided at such 'split part with slightly separated opposed, outwardly extending ears 30, 30, coactmg with which is. a screw for binding them together.

A sleeve t having external screw threads 32 at a portion thereof, and said sleeve being longer than the dimension ofethe boss provided arm in theA line of its bore, is engagedl through, and-,axially adjustable. in the bore of said arm byreason of its screw thread `engagement. t

The tool carrying spindle is fitted for rotation through said sleeve, and it has shoul-l ders u, u2, engagingat the opposite ends of sa-id sleeve, absolutely preventing endwise movement of the spindle. relatively to the sleeve.

The sleeve has at its lower end portion below the lower end v.ofthe boss o. and below the screw threads 32 formed on the sleeve, a knurled flange enlargementv, bymeans of which the sleeve may. be -turned,-when permitted. by the loosening ofthe means before mentioned for maintaining the screw threads in binding engagement,-by which turning of the sleeve the vertical adjustment of the drill spindle.- is. most conveniently accomplished.

I mayconstruct the member D which .has the. downwardly opening pivotal way therethrough, and which carries the elastic nut, and one segment of which is plain or unthreaded, with a boss or trunnion e2 as shown in Fig. ,9, which engagesin a hole therefor opening at the under side of the support-fb for centering the member and confining the same in its rotative adjustments by clamping screws and bolts, the Shanks ofthe screws, as understood, engaging through thearc shaped slots 40, 40 inthe plate-like upper portion of the member D, but this is a' modification in design onlyof the means comprising the considerable upwardly extended stud d adapted for the screw engagement therewithofthe clamping nut.

Iclaini 1. The combination of two members, one of which is slidable 4relatively to the other, one member-.being provided with :tuut-segment, ascrew-shaft'having by one end por tion thereof an engagement Awith the other member making it both rotative and .capable ofy swinging, but' endwiseimmovable relatively to' such member, and a spring pressed part for yieldingly maintaining sald screwshaft in its .removable engagement with the threads of said nut segment.

2.v The combination .with amemberhaving a slide way and provided with ay nutseg-ment within, and narrowerthan, said slideway, of a second member movably engagedwithin said slideway, constructed with a longitudinal opening and straddling about said nut segment, a screw shaft having by one end portion thereof an engagement with the second named member for making it both rotative and capable of swinging relatively thereto, and a semi-circularly recessed block, accommodated in the longitudinal opening in said second member, said block having spring means associated therewith for yieldingly and normally forcing the shaft to screw engagement with' said nut segment.

3. The combination with a member provided with a nut segment, of a second member slidable along the first member and provided with a screw shaft having an engagement with such member, making it rotatable, n

and capable of a swinging movement, but endwise immovable, relatively to such member, and a saddle block spring pressed transversely towards the axis of the shaft and engaging the latter for normally maintaining it engaged with said nut segment.

4. The combination of two members one of which is slidable relatively to the other,

`in and beyond the upper side of said head one of said members being provided with a nut segment, a screw shaft having an engagement with the other member making it rotatable, and capable of a swinging movement relatively thereto, a block having a semi-cylindrical recess in a side thereof, opposed to the threaded cavity in the nut segment, and adapted for engagement with an intermediate portion of the screw shaft and means for yieldingly supporting the saddle block from the nut segment.

- 5. The combination of two members, one of which has a dovetail slideway and provided with a nut segment therein, and the other member being slidably fitted in the dovetail way of the first member, and constructed with a longitudinal groove with a' wall at one end thereof, a screw shaft having au engagement withv the groove end wall of the second member, rendering it rotatable, and capable of a swinging movement, but endwise immovable relatively to such memher, a block having a semi-cylindrical recess in a side thereof opposed to the threaded cavity in the nut segment, and adapted for engagement with an intermedia-te portion of the screw shaft, means interengaged between tlie nut segment and said block for guiding the latter in its movements away from and towards the block, and one or more springs sustained by the nut segment and holding said block yieldingly in its proximity thereto.

6. The combination of two members, one of which has a dovetail slideway and provided with a nut segment thereln, and the other member being slidably fitted in the dovetail way of the first member, and constructcd with a longitudinal groove with a wall at. one end thereof, a screw shaft having an engagement with the groove end wall of the second member, rendering it rotatable, and capable of a swinging movement, but endwise immovable relatively to such member, a block having a semi-cylindrical recess in a sideV thereof opposed to the threaded cavity in the nut segment, adapted for en gagement with an intermediate portion of the screw shaft, and havmg parallel-bores therethrough, each of two diameters wherehaving its extremity screw threaded and provided with a transverse aperture therethrough, a tapered pin engagedA through said transverse aperture of the stud, having by its side a crowding enga ement against the adjacent upper face o the head, a washer, adapted to surround said stud, having a recess in its under side for the accommodation of said tapered pin, and haying a stop or wall at one end thereof to prevent endwise displacementfo'f the pin, and a nut engaging the extremity of the stud and adapted to be downwardly set against said recessed washer.

8. lThe combination with an arm having a bore therethrough at right angles to its length, said bore having 'screw threads therein, of a sleeve externally screw threaded, en-

` gaged through and axially adjustable in the bore of said arm, and havlng at one end portion thereof va knurled flange enlargement, a

tool carrying spindle fitted for rotation through said sleeve having shoulders engaging at the opposite ends of said sleeve and preventing endwise movement of the spindle relatively to the sleeve, and means for effecting a temporary binding of the interengaged threads in said bored arm and the sleeve therein, for preventing rotative movement of the sleeve..

9. The combination with an arm constructed with a transversely elongated boss having a bore therethrough at right angles to the length of the arm, said bore having screw threads in the boss-extended portion thereof, and said boss extension being split alongl a line parallel with its axis, andhaving outwardly extended ears, and means coacting therewith for drawing them together, of a sleeve externally screw threaded at a portion of the spindle relatively to the sleeve, and thereof and longer than the dimension of the t means for rotatvely driving the spindle. lo boss provided arm in the line of its bore, en-

Signed by me at Springfield, Mass., in gaged through and axially adjustable n the i presence of two subscribing Witnesses.

bore of said arm, a tool-oarryingspindle FRANK E. BOGORSELSK. fitted for rotation through said sleeve, havlVtnesses:

ing Shoulders engaging at the opposite ends 1 G. R. DRISCOLL,

of the sleeve, preventing endwise movement i W. S. BELLOWS. 

